Refrigerating composition



Patented Dec. 30, 1930 [TED ES PATENT orFr v oscan mmmcmor wrnzmnnsnoar, mean 32mm, 6 i i i anon To win- EELM KASH, OF WILMERSDOBI, NEAR BERLIN: GERMANY nnrnrennarmc oomrosrrron Ho Drawing. Application filed June 2, 1926, Serial No. 118,324, and in- Germany Hovember 31, 1885.

This invention has reference to im rovements in refrigerating compounds, an it refers in particular to refrigerating mixtures containing ammonium-chloride and sodium carbonate as the main constituents, and

adapted to produce a great decrease of temperature at low expense and in a ver economical and etiicient manner. The re igerant accordin to this invention among other 10 important a vantages is particularly distinguished by its being reduced without the use of snow orice an Without the employment of acids. As the best refrigerating mixture of this general kind a mixture has been suggested heretofore consisting of ammo nium nitrate and sodium carbonate and water,

the compound most generally employed consisting of a mixture of 1 part ammonium-nitrate, 1 art of sodium carbonate and 1 part water ith such previous refrigerating mixtures a drop of temperature of 31 degrees 'centi ade was obtained, but there was the draw ack that this mixture was comparativel expensive, and there was the grave objection that the ammonium nitrate was difiicult- 1y obtainable. As a substitute therefor a mixture of ammonium-chloride, saltpeter, Glauber-salt (sodium-sul hate) and water has been'proposed; but with this mixture it so was only possible to produce a drop of tem-' perature of 25 degrees centi ade, while the rice of this mixture was sti l comparatively i h, a

blow, it has been ascertained by my experiments that a decrease of temperature from about to 31 degrees centi ade may be obtained by making use accor ing to my invention of a mixture of ammonium-chloride, sodium carbonate andwater, while on the other hand ammonium-chloride alone with water will only produce a drop of temperature of ltdegrees 0., and sodium-carbonate alone with water roduces only a decrease of temperature org degrees centigrade.

The best results are accomplished by employing sodium carbonate in excess relatively to the ammonium-chloride while the water should be present in excess with relation to the salts. The maximum decrease of temperature was obtainedby using a mixture of two parts ammonium-chloride, three parts sodrum-carbonate and six parts of water. Of this mixture the amount required costs only about a quarter of the price of the mixture of ammonium-nitrate, sodium-carbonate and water. For the better illustration of the efiiciency of the new refrigerating mixture,- 1 herewith submit a series of tests carried out with the respective mixtures referred to and with the drop of temperature hereinafter mentioned:- i I. 100. parts by weight ammonium chloride, 50 parts by weight sodium rcarbonate, 300 pfaggs by weight water, dropoftemperature o a a II. parts by we' ht ammonium chloride, arts by weig t sodium carbonate, 400 parts y weight water, drop of temperature of 24?. III. 100 parts by weight ammonium chloride, 109 parts by weight sodium carbonate, 300 parts y weight water, drop of tempera- I ture of 27.

IV. 100 parts by wei ht ammonium chloride, 100 parts by weig t sodium carbonate, 200 parts y weight water, drop ,of tempera ture of 29. a

V. 100 parts by wei ht ammonium chloride, 150 arts by weig t sodium carbonate, 300 parts y weight Watson-drop of temperature of 31. 7

VI. 100 parts by wei ht ammonium chloride, 200 arts by weig t sodium carbonate, 300 parts y weight water, drop of temperature of 31?.

VII. 100 parts by weight ammonium chloride, 150 arts by weight sodium carbonate, 200 parts y weight water, drop of temperature of 29.

The proportions mentioned sub V have been shown to be the most favorable.

According to these proportions from 300 am's ammonium chloride, 450 grams soum carbonate, 900 grams water, a mixture of altogether 1400 c. c. is obtained showing a decrease of temperature of 31 C; while the known mixture consisting of 550 grams ammonium nitrate, 550 grams sodium carbonate, 7 550 grams water, yields an amount of 1285 2 i reeeee grams and produces e decrease of temperature of 31-32" C.

It should be understood that all these pro- '.portions and combinations of ingredients are merely given t) Way of example, and that the invention s, susceptible of modifi-v cation and changes within the scope of the claims hereinafter submitted.

I claim 1. A refrigeratin mixture consisting 0i a mixture of ammomum-chioride with an excess of sodium-carbonate, adapted to produce a decrease of temperature upon being dissolved.

2. A refrigerating composition, consisting of a mixture of ammonium-chloride and sodium-carbonate adapted to produce a de-' crease of temperature upon being dissolved. 3. A refrigerating composition, consisting 20 of two. parts ammonium.-chloride and three parts sodium-carbonate adapted to produce a decrease of temperature upon being dissolved.

- 4. Process for decreasing of the tempera- 25 ture by the application of a freezing or cooling mixture, characterized in that two parts of ammonium-chloride and three parts of sodium-carbonatefare dissolved in six parts of water. v

In testimony whereof I afix my signature.

"JD n6 USGAR 'HANNMCH. 

